1# SPDX-License-Identifier: GPL-2.0-only 2menuconfig PWM 3 bool "Pulse-Width Modulation (PWM) Support" 4 help 5 Generic Pulse-Width Modulation (PWM) support. 6 7 In Pulse-Width Modulation, a variation of the width of pulses 8 in a rectangular pulse signal is used as a means to alter the 9 average power of the signal. Applications include efficient 10 power delivery and voltage regulation. In computer systems, 11 PWMs are commonly used to control fans or the brightness of 12 display backlights. 13 14 This framework provides a generic interface to PWM devices 15 within the Linux kernel. On the driver side it provides an API 16 to register and unregister a PWM chip, an abstraction of a PWM 17 controller, that supports one or more PWM devices. Client 18 drivers can request PWM devices and use the generic framework 19 to configure as well as enable and disable them. 20 21 This generic framework replaces the legacy PWM framework which 22 allows only a single driver implementing the required API. Not 23 all legacy implementations have been ported to the framework 24 yet. The framework provides an API that is backward compatible 25 with the legacy framework so that existing client drivers 26 continue to work as expected. 27 28 If unsure, say no. 29 30if PWM 31 32config PWM_SYSFS 33 bool 34 default y if SYSFS 35 36config PWM_DEBUG 37 bool "PWM lowlevel drivers additional checks and debug messages" 38 depends on DEBUG_KERNEL 39 help 40 This option enables some additional checks to help lowlevel driver 41 authors to get their callbacks implemented correctly. 42 It is expected to introduce some runtime overhead and diagnostic 43 output to the kernel log, so only enable while working on a driver. 44 45config PWM_AB8500 46 tristate "AB8500 PWM support" 47 depends on AB8500_CORE && ARCH_U8500 48 help 49 Generic PWM framework driver for Analog Baseband AB8500. 50 51 To compile this driver as a module, choose M here: the module 52 will be called pwm-ab8500. 53 54config PWM_ATMEL 55 tristate "Atmel PWM support" 56 depends on ARCH_AT91 || COMPILE_TEST 57 depends on HAS_IOMEM && OF 58 help 59 Generic PWM framework driver for Atmel SoC. 60 61 To compile this driver as a module, choose M here: the module 62 will be called pwm-atmel. 63 64config PWM_ATMEL_HLCDC_PWM 65 tristate "Atmel HLCDC PWM support" 66 depends on MFD_ATMEL_HLCDC 67 depends on HAVE_CLK 68 help 69 Generic PWM framework driver for the PWM output of the HLCDC 70 (Atmel High-end LCD Controller). This PWM output is mainly used 71 to control the LCD backlight. 72 73 To compile this driver as a module, choose M here: the module 74 will be called pwm-atmel-hlcdc. 75 76config PWM_ATMEL_TCB 77 tristate "Atmel TC Block PWM support" 78 depends on OF 79 select REGMAP_MMIO 80 help 81 Generic PWM framework driver for Atmel Timer Counter Block. 82 83 A Timer Counter Block provides 6 PWM devices grouped by 2. 84 Devices in a given group must have the same period. 85 86 To compile this driver as a module, choose M here: the module 87 will be called pwm-atmel-tcb. 88 89config PWM_BCM_IPROC 90 tristate "iProc PWM support" 91 depends on ARCH_BCM_IPROC || COMPILE_TEST 92 depends on COMMON_CLK && HAS_IOMEM 93 default ARCH_BCM_IPROC 94 help 95 Generic PWM framework driver for Broadcom iProc PWM block. This 96 block is used in Broadcom iProc SoC's. 97 98 To compile this driver as a module, choose M here: the module 99 will be called pwm-bcm-iproc. 100 101config PWM_BCM_KONA 102 tristate "Kona PWM support" 103 depends on ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS || COMPILE_TEST 104 depends on HAVE_CLK && HAS_IOMEM 105 default ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS 106 help 107 Generic PWM framework driver for Broadcom Kona PWM block. 108 109 To compile this driver as a module, choose M here: the module 110 will be called pwm-bcm-kona. 111 112config PWM_BCM2835 113 tristate "BCM2835 PWM support" 114 depends on ARCH_BCM2835 || ARCH_BRCMSTB || COMPILE_TEST 115 depends on HAS_IOMEM 116 help 117 PWM framework driver for BCM2835 controller (Raspberry Pi) 118 119 To compile this driver as a module, choose M here: the module 120 will be called pwm-bcm2835. 121 122config PWM_BERLIN 123 tristate "Marvell Berlin PWM support" 124 depends on ARCH_BERLIN || COMPILE_TEST 125 depends on HAS_IOMEM 126 help 127 PWM framework driver for Marvell Berlin SoCs. 128 129 To compile this driver as a module, choose M here: the module 130 will be called pwm-berlin. 131 132config PWM_BRCMSTB 133 tristate "Broadcom STB PWM support" 134 depends on ARCH_BRCMSTB || BMIPS_GENERIC || COMPILE_TEST 135 depends on HAS_IOMEM 136 help 137 Generic PWM framework driver for the Broadcom Set-top-Box 138 SoCs (BCM7xxx). 139 140 To compile this driver as a module, choose M Here: the module 141 will be called pwm-brcmstb.c. 142 143config PWM_CLPS711X 144 tristate "CLPS711X PWM support" 145 depends on ARCH_CLPS711X || COMPILE_TEST 146 depends on HAS_IOMEM 147 help 148 Generic PWM framework driver for Cirrus Logic CLPS711X. 149 150 To compile this driver as a module, choose M here: the module 151 will be called pwm-clps711x. 152 153config PWM_CRC 154 bool "Intel Crystalcove (CRC) PWM support" 155 depends on X86 && INTEL_SOC_PMIC 156 help 157 Generic PWM framework driver for Crystalcove (CRC) PMIC based PWM 158 control. 159 160config PWM_CROS_EC 161 tristate "ChromeOS EC PWM driver" 162 depends on CROS_EC 163 help 164 PWM driver for exposing a PWM attached to the ChromeOS Embedded 165 Controller. 166 167config PWM_DWC 168 tristate "DesignWare PWM Controller" 169 depends on PCI 170 help 171 PWM driver for Synopsys DWC PWM Controller attached to a PCI bus. 172 173 To compile this driver as a module, choose M here: the module 174 will be called pwm-dwc. 175 176config PWM_EP93XX 177 tristate "Cirrus Logic EP93xx PWM support" 178 depends on ARCH_EP93XX || COMPILE_TEST 179 depends on HAS_IOMEM 180 help 181 Generic PWM framework driver for Cirrus Logic EP93xx. 182 183 To compile this driver as a module, choose M here: the module 184 will be called pwm-ep93xx. 185 186config PWM_FSL_FTM 187 tristate "Freescale FlexTimer Module (FTM) PWM support" 188 depends on HAS_IOMEM 189 depends on OF 190 select REGMAP_MMIO 191 help 192 Generic FTM PWM framework driver for Freescale VF610 and 193 Layerscape LS-1 SoCs. 194 195 To compile this driver as a module, choose M here: the module 196 will be called pwm-fsl-ftm. 197 198config PWM_HIBVT 199 tristate "HiSilicon BVT PWM support" 200 depends on ARCH_HISI || COMPILE_TEST 201 depends on HAS_IOMEM 202 help 203 Generic PWM framework driver for HiSilicon BVT SoCs. 204 205 To compile this driver as a module, choose M here: the module 206 will be called pwm-hibvt. 207 208config PWM_IMG 209 tristate "Imagination Technologies PWM driver" 210 depends on HAS_IOMEM 211 depends on MFD_SYSCON 212 depends on COMMON_CLK 213 depends on MIPS || COMPILE_TEST 214 help 215 Generic PWM framework driver for Imagination Technologies 216 PWM block which supports 4 channels. 217 218 To compile this driver as a module, choose M here: the module 219 will be called pwm-img 220 221config PWM_IMX1 222 tristate "i.MX1 PWM support" 223 depends on ARCH_MXC || COMPILE_TEST 224 depends on HAS_IOMEM 225 help 226 Generic PWM framework driver for i.MX1 and i.MX21 227 228 To compile this driver as a module, choose M here: the module 229 will be called pwm-imx1. 230 231config PWM_IMX27 232 tristate "i.MX27 PWM support" 233 depends on ARCH_MXC || COMPILE_TEST 234 depends on HAS_IOMEM 235 help 236 Generic PWM framework driver for i.MX27 and later i.MX SoCs. 237 238 To compile this driver as a module, choose M here: the module 239 will be called pwm-imx27. 240 241config PWM_IMX_TPM 242 tristate "i.MX TPM PWM support" 243 depends on ARCH_MXC || COMPILE_TEST 244 depends on HAVE_CLK && HAS_IOMEM 245 help 246 Generic PWM framework driver for i.MX7ULP TPM module, TPM's full 247 name is Low Power Timer/Pulse Width Modulation Module. 248 249 To compile this driver as a module, choose M here: the module 250 will be called pwm-imx-tpm. 251 252config PWM_INTEL_LGM 253 tristate "Intel LGM PWM support" 254 depends on HAS_IOMEM 255 depends on (OF && X86) || COMPILE_TEST 256 select REGMAP_MMIO 257 help 258 Generic PWM fan controller driver for LGM SoC. 259 260 To compile this driver as a module, choose M here: the module 261 will be called pwm-intel-lgm. 262 263config PWM_IQS620A 264 tristate "Azoteq IQS620A PWM support" 265 depends on MFD_IQS62X || COMPILE_TEST 266 help 267 Generic PWM framework driver for the Azoteq IQS620A multi-function 268 sensor. 269 270 To compile this driver as a module, choose M here: the module will 271 be called pwm-iqs620a. 272 273config PWM_JZ4740 274 tristate "Ingenic JZ47xx PWM support" 275 depends on MIPS || COMPILE_TEST 276 depends on COMMON_CLK 277 select MFD_SYSCON 278 help 279 Generic PWM framework driver for Ingenic JZ47xx based 280 machines. 281 282 To compile this driver as a module, choose M here: the module 283 will be called pwm-jz4740. 284 285config PWM_KEEMBAY 286 tristate "Intel Keem Bay PWM driver" 287 depends on ARCH_KEEMBAY || COMPILE_TEST 288 depends on COMMON_CLK && HAS_IOMEM 289 help 290 The platform driver for Intel Keem Bay PWM controller. 291 292 To compile this driver as a module, choose M here: the module 293 will be called pwm-keembay. 294 295config PWM_LP3943 296 tristate "TI/National Semiconductor LP3943 PWM support" 297 depends on MFD_LP3943 298 help 299 Generic PWM framework driver for LP3943 which supports two PWM 300 channels. 301 302 To compile this driver as a module, choose M here: the module 303 will be called pwm-lp3943. 304 305config PWM_LPC18XX_SCT 306 tristate "LPC18xx/43xx PWM/SCT support" 307 depends on ARCH_LPC18XX || COMPILE_TEST 308 depends on HAS_IOMEM 309 help 310 Generic PWM framework driver for NXP LPC18xx PWM/SCT which 311 supports 16 channels. 312 A maximum of 15 channels can be requested simultaneously and 313 must have the same period. 314 315 To compile this driver as a module, choose M here: the module 316 will be called pwm-lpc18xx-sct. 317 318config PWM_LPC32XX 319 tristate "LPC32XX PWM support" 320 depends on ARCH_LPC32XX || COMPILE_TEST 321 depends on HAS_IOMEM 322 help 323 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 324 PWM controllers. 325 326 To compile this driver as a module, choose M here: the module 327 will be called pwm-lpc32xx. 328 329config PWM_LPSS 330 depends on HAS_IOMEM 331 tristate 332 333config PWM_LPSS_PCI 334 tristate "Intel LPSS PWM PCI driver" 335 depends on X86 || COMPILE_TEST 336 depends on HAS_IOMEM && PCI 337 select PWM_LPSS 338 help 339 The PCI driver for Intel Low Power Subsystem PWM controller. 340 341 To compile this driver as a module, choose M here: the module 342 will be called pwm-lpss-pci. 343 344config PWM_LPSS_PLATFORM 345 tristate "Intel LPSS PWM platform driver" 346 depends on (X86 && ACPI) || COMPILE_TEST 347 depends on HAS_IOMEM 348 select PWM_LPSS 349 help 350 The platform driver for Intel Low Power Subsystem PWM controller. 351 352 To compile this driver as a module, choose M here: the module 353 will be called pwm-lpss-platform. 354 355config PWM_MESON 356 tristate "Amlogic Meson PWM driver" 357 depends on ARCH_MESON || COMPILE_TEST 358 depends on COMMON_CLK && HAS_IOMEM 359 help 360 The platform driver for Amlogic Meson PWM controller. 361 362 To compile this driver as a module, choose M here: the module 363 will be called pwm-meson. 364 365config PWM_MTK_DISP 366 tristate "MediaTek display PWM driver" 367 depends on ARCH_MEDIATEK || COMPILE_TEST 368 depends on HAS_IOMEM 369 help 370 Generic PWM framework driver for MediaTek disp-pwm device. 371 The PWM is used to control the backlight brightness for display. 372 373 To compile this driver as a module, choose M here: the module 374 will be called pwm-mtk-disp. 375 376config PWM_MEDIATEK 377 tristate "MediaTek PWM support" 378 depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST 379 depends on HAS_IOMEM 380 help 381 Generic PWM framework driver for Mediatek ARM SoC. 382 383 To compile this driver as a module, choose M here: the module 384 will be called pwm-mediatek. 385 386config PWM_MXS 387 tristate "Freescale MXS PWM support" 388 depends on ARCH_MXS || COMPILE_TEST 389 depends on HAS_IOMEM && OF 390 select STMP_DEVICE 391 help 392 Generic PWM framework driver for Freescale MXS. 393 394 To compile this driver as a module, choose M here: the module 395 will be called pwm-mxs. 396 397config PWM_NTXEC 398 tristate "Netronix embedded controller PWM support" 399 depends on MFD_NTXEC 400 help 401 Say yes here if you want to support the PWM output of the embedded 402 controller found in certain e-book readers designed by the original 403 design manufacturer Netronix. 404 405config PWM_OMAP_DMTIMER 406 tristate "OMAP Dual-Mode Timer PWM support" 407 depends on OF 408 depends on OMAP_DM_TIMER || COMPILE_TEST 409 help 410 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output 411 412 To compile this driver as a module, choose M here: the module 413 will be called pwm-omap-dmtimer 414 415config PWM_PCA9685 416 tristate "NXP PCA9685 PWM driver" 417 depends on I2C 418 select REGMAP_I2C 419 help 420 Generic PWM framework driver for NXP PCA9685 LED controller. 421 422 To compile this driver as a module, choose M here: the module 423 will be called pwm-pca9685. 424 425config PWM_PXA 426 tristate "PXA PWM support" 427 depends on ARCH_PXA || COMPILE_TEST 428 depends on HAS_IOMEM 429 help 430 Generic PWM framework driver for PXA. 431 432 To compile this driver as a module, choose M here: the module 433 will be called pwm-pxa. 434 435config PWM_RASPBERRYPI_POE 436 tristate "Raspberry Pi Firwmware PoE Hat PWM support" 437 # Make sure not 'y' when RASPBERRYPI_FIRMWARE is 'm'. This can only 438 # happen when COMPILE_TEST=y, hence the added !RASPBERRYPI_FIRMWARE. 439 depends on RASPBERRYPI_FIRMWARE || (COMPILE_TEST && !RASPBERRYPI_FIRMWARE) 440 help 441 Enable Raspberry Pi firmware controller PWM bus used to control the 442 official RPI PoE hat 443 444config PWM_RCAR 445 tristate "Renesas R-Car PWM support" 446 depends on ARCH_RENESAS || COMPILE_TEST 447 depends on HAS_IOMEM 448 help 449 This driver exposes the PWM Timer controller found in Renesas 450 R-Car chips through the PWM API. 451 452 To compile this driver as a module, choose M here: the module 453 will be called pwm-rcar. 454 455config PWM_RENESAS_TPU 456 tristate "Renesas TPU PWM support" 457 depends on ARCH_RENESAS || COMPILE_TEST 458 depends on HAS_IOMEM 459 help 460 This driver exposes the Timer Pulse Unit (TPU) PWM controller found 461 in Renesas chips through the PWM API. 462 463 To compile this driver as a module, choose M here: the module 464 will be called pwm-renesas-tpu. 465 466config PWM_ROCKCHIP 467 tristate "Rockchip PWM support" 468 depends on ARCH_ROCKCHIP || COMPILE_TEST 469 depends on HAS_IOMEM 470 help 471 Generic PWM framework driver for the PWM controller found on 472 Rockchip SoCs. 473 474config PWM_SAMSUNG 475 tristate "Samsung PWM support" 476 depends on PLAT_SAMSUNG || ARCH_S5PV210 || ARCH_EXYNOS || COMPILE_TEST 477 depends on HAS_IOMEM 478 help 479 Generic PWM framework driver for Samsung S3C24xx, S3C64xx, S5Pv210 480 and Exynos SoCs. 481 Choose Y here only if you build for such Samsung SoC. 482 483 To compile this driver as a module, choose M here: the module 484 will be called pwm-samsung. 485 486config PWM_SIFIVE 487 tristate "SiFive PWM support" 488 depends on OF 489 depends on COMMON_CLK && HAS_IOMEM 490 depends on RISCV || COMPILE_TEST 491 help 492 Generic PWM framework driver for SiFive SoCs. 493 494 To compile this driver as a module, choose M here: the module 495 will be called pwm-sifive. 496 497config PWM_SL28CPLD 498 tristate "Kontron sl28cpld PWM support" 499 depends on MFD_SL28CPLD || COMPILE_TEST 500 help 501 Generic PWM framework driver for board management controller 502 found on the Kontron sl28 CPLD. 503 504 To compile this driver as a module, choose M here: the module 505 will be called pwm-sl28cpld. 506 507config PWM_SPEAR 508 tristate "STMicroelectronics SPEAr PWM support" 509 depends on PLAT_SPEAR || COMPILE_TEST 510 depends on HAS_IOMEM && OF 511 help 512 Generic PWM framework driver for the PWM controller on ST 513 SPEAr SoCs. 514 515 To compile this driver as a module, choose M here: the module 516 will be called pwm-spear. 517 518config PWM_SPRD 519 tristate "Spreadtrum PWM support" 520 depends on ARCH_SPRD || COMPILE_TEST 521 depends on HAS_IOMEM 522 help 523 Generic PWM framework driver for the PWM controller on 524 Spreadtrum SoCs. 525 526 To compile this driver as a module, choose M here: the module 527 will be called pwm-sprd. 528 529config PWM_STI 530 tristate "STiH4xx PWM support" 531 depends on ARCH_STI || COMPILE_TEST 532 depends on HAS_IOMEM && OF 533 help 534 Generic PWM framework driver for STiH4xx SoCs. 535 536 To compile this driver as a module, choose M here: the module 537 will be called pwm-sti. 538 539config PWM_STM32 540 tristate "STMicroelectronics STM32 PWM" 541 depends on MFD_STM32_TIMERS || COMPILE_TEST 542 help 543 Generic PWM framework driver for STM32 SoCs. 544 545 To compile this driver as a module, choose M here: the module 546 will be called pwm-stm32. 547 548config PWM_STM32_LP 549 tristate "STMicroelectronics STM32 PWM LP" 550 depends on MFD_STM32_LPTIMER || COMPILE_TEST 551 help 552 Generic PWM framework driver for STMicroelectronics STM32 SoCs 553 with Low-Power Timer (LPTIM). 554 555 To compile this driver as a module, choose M here: the module 556 will be called pwm-stm32-lp. 557 558config PWM_STMPE 559 bool "STMPE expander PWM export" 560 depends on MFD_STMPE 561 help 562 This enables support for the PWMs found in the STMPE I/O 563 expanders. 564 565config PWM_SUN4I 566 tristate "Allwinner PWM support" 567 depends on ARCH_SUNXI || COMPILE_TEST 568 depends on HAS_IOMEM && COMMON_CLK 569 help 570 Generic PWM framework driver for Allwinner SoCs. 571 572 To compile this driver as a module, choose M here: the module 573 will be called pwm-sun4i. 574 575config PWM_SUNPLUS 576 tristate "Sunplus PWM support" 577 depends on ARCH_SUNPLUS || COMPILE_TEST 578 depends on HAS_IOMEM && OF 579 help 580 Generic PWM framework driver for the PWM controller on 581 Sunplus SoCs. 582 583 To compile this driver as a module, choose M here: the module 584 will be called pwm-sunplus. 585 586config PWM_TEGRA 587 tristate "NVIDIA Tegra PWM support" 588 depends on ARCH_TEGRA || COMPILE_TEST 589 depends on HAS_IOMEM 590 help 591 Generic PWM framework driver for the PWFM controller found on NVIDIA 592 Tegra SoCs. 593 594 To compile this driver as a module, choose M here: the module 595 will be called pwm-tegra. 596 597config PWM_TIECAP 598 tristate "ECAP PWM support" 599 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST 600 depends on HAS_IOMEM 601 help 602 PWM driver support for the ECAP APWM controller found on TI SOCs 603 604 To compile this driver as a module, choose M here: the module 605 will be called pwm-tiecap. 606 607config PWM_TIEHRPWM 608 tristate "EHRPWM PWM support" 609 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_K3 || COMPILE_TEST 610 depends on HAS_IOMEM 611 help 612 PWM driver support for the EHRPWM controller found on TI SOCs 613 614 To compile this driver as a module, choose M here: the module 615 will be called pwm-tiehrpwm. 616 617config PWM_TWL 618 tristate "TWL4030/6030 PWM support" 619 depends on TWL4030_CORE 620 help 621 Generic PWM framework driver for TWL4030/6030. 622 623 To compile this driver as a module, choose M here: the module 624 will be called pwm-twl. 625 626config PWM_TWL_LED 627 tristate "TWL4030/6030 PWM support for LED drivers" 628 depends on TWL4030_CORE 629 help 630 Generic PWM framework driver for TWL4030/6030 LED terminals. 631 632 To compile this driver as a module, choose M here: the module 633 will be called pwm-twl-led. 634 635config PWM_VISCONTI 636 tristate "Toshiba Visconti PWM support" 637 depends on ARCH_VISCONTI || COMPILE_TEST 638 help 639 PWM Subsystem driver support for Toshiba Visconti SoCs. 640 641 To compile this driver as a module, choose M here: the module 642 will be called pwm-visconti. 643 644config PWM_VT8500 645 tristate "vt8500 PWM support" 646 depends on ARCH_VT8500 || COMPILE_TEST 647 depends on HAS_IOMEM 648 help 649 Generic PWM framework driver for vt8500. 650 651 To compile this driver as a module, choose M here: the module 652 will be called pwm-vt8500. 653 654config PWM_XILINX 655 tristate "Xilinx AXI Timer PWM support" 656 depends on OF_ADDRESS 657 depends on COMMON_CLK 658 select REGMAP_MMIO 659 help 660 PWM driver for Xilinx LogiCORE IP AXI timers. This timer is 661 typically a soft core which may be present in Xilinx FPGAs. 662 This device may also be present in Microblaze soft processors. 663 If you don't have this IP in your design, choose N. 664 665 To compile this driver as a module, choose M here: the module 666 will be called pwm-xilinx. 667 668endif 669